Epidemiological patterns of the import and spread of El Tor cholera]

The paper is a response to the paper by A. K. Akiev published in 1974 in the "Journal of Microbiology Epidemiology and Immunobiology": "Concerning the Epidemiology of El Tor cholera Abroad". The opinion of the author concerning the origin of El Tor infection in 1970, the sources of infection, and the factors of its transmission is critisized. Literature data and personal observations explaining the regularities of importation and spread of El Tor cholera as an intestinal infection are presented; these data are against the view of Akiev on El Tor cholera as a disease with a natural nidality caused by freely living vibrios.